Is this a relapse?

I was watching an episode of Black mirror, and I usually only watch the ones that are relatively clean. But the episode that I watched made me feel really gross because all of the sudden a porn scene showed up and I skipped it. Usually, I wouldn’t ask if this was a relapse because clearly it wasn’t my fault but even from that quick, second of seeing it, I got a boner. Now I feel gross and like I relapsed.